Getting started with ASP NET MVC Dhananjay Kumar

Getting started with ASP. NET MVC Dhananjay Kumar @debug_mode http: //debugmode. net

Agenda Ø Ø Ø Getting started with ASP. NET MVC Understanding Controllers Understanding Views Understanding Model View. Bag, View. Data, and Temp. Data Strongly Typed and dynamic views Child Action and Partial Views Areas Database first approach Code first approach Using client side libraries like j. Query, Ignite UI

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I am Dhananjay Kumar ØDeveloper Evangelist @infragistics Ø 6 times Microsoft MVP Ø@debug_mode Ødebugmode@outlook. com Øhttp: //debugmode. net

ASP. NET MVC Controller View Model

ASP. NET MVC ü Clean separation of concerns ü Enables or support Test Driven Development ü Easy integration with client side libraries like Java. Script, j. Query, and Ignite UI ü Developer has full control over the rendered HTML ü Due to stateless nature and URL routing, highly optimized for search engines ü Supports Authentication, authorization, configuration, compilation and deployment

Controller A Controller does all the actions in MVC. It handles user interactions or inputs. It passes user's data to a Model and selects a View to render on the UI. ü A Controller is a class ü It contains one or more methods called Actions ü An Action can return a simple string or a selected View to the UI ü Action takes all browser requests or user inputs ü It retrieves data from the Model ü It selects the View to be rendered on the UI

Controller

Controller Demo

Views are the components that display the application's user interface (UI) ü It renders user interface ü It contains markup to be rendered with the View. Engine ü There are two kinds of View. Engine in MVC- Razor and ASPX engine ü Controller may returns View ü View renders data from the Model returned by the Controller ü Controller can send data to View

View

View Demo

Model is a class which represents the problem domain. Model implements logic for the application data. ü Model is a class ü It is accessible to both the view and the controller ü Views renders data from the model ü Controller can pass data from model to the view ü Model class contain the application logic ü Model is place of the ORM or Data Access frameworks

Model ORM Business Logic Application data logic Model

Model Demo

Passing Data View. Bag • dynamic object to pass data from controller to view View. Data • dictionary object to pass data from controller to view Temp. Data • dictionary object to pass data from one controller/action to another controller/action

View. Bag and View. Data

Demo on View. Data and View. Bag

View. Bag and View. Data

Temp. Data

Temp. Data ü Temp. Data is used to pass data from one HTTP request to next HTTP request. ü In other words, Temp. Data is used to pass data from one controller to another controller or action to another action. ü Temp. Data is property of Base. Controller class. ü Temp. Data stores data in session object ü Temp. Data is property of Controller. Base class ü To read data Typecasting and null checking is required. ü Type of Temp. Data is Temp. Data. Dictionary. ü Temp. Data works with HTTP redirection like HTTP 302/303 status code

Temp. Data Demo

Types of Views Dynamic Views Strongly Typed Views

Different kinds of View Demo

Child Actions are the action methods which can be invoked within a view. ü Child Actions are the action methods which can be invoked within the view ü This is used to work with the data in the view, which are not related to the main action method ü In ASP. NET MVC any action can be used as a child action ü To use an action only as a child action and attribute it with the Child. Action. Only. It will make sure the action is not called by any user request and will only be used in the view.

Child Action Demo

Areas ü A MVC application can have any number of Areas ü Each Areas has its own controllers, models, and views. ü Physically Areas are put under separate folders. ü Areas are useful in managing big web applications

Areas Demo

Summary Ø Ø Ø Getting started with ASP. NET MVC Understanding Controllers Understanding Views Understanding Model View. Bag, View. Data, and Temp. Data Strongly Typed and dynamic views Child Action and Partial Views Areas Database first approach Code first approach Using client side libraries like j. Query, Ignite UI

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